One of my teammates and good friend Keith Combs, just posted information about on how to get the Windows Vista Product guide.  The product guide is a great source of information Windows Vista and some of the technology behind it.  In addition Keith talked about how to download the document but also how to load the proper viewer to use the doc.  Check out Keith’s post: http://blogs.technet.com/keithcombs/archive/2006/04/12/425079.aspx